What are the dimensions of the trainer bag? Philip Cowles March 30, 2018 17:23 Updated Follow The depth of the bag is about 9", the height is about 22", the narrowest part is about 13" and the widest part is about 22". Related articles What trainers does this bag work with? Does the CycleOps trainer tire fit 29er wheels? How do I clean my training mat? Comments 0 comments Please sign in to leave a comment.